OK, I found a work around...but I'm not very happy about it. First I had to update my Mac desktop version of BIAB 2015 to the latest build. Then I had to re-save the song in the new version and output a new m4a sound file, then download both to the iPhone app. So it looks like I'll have to redo my entire song library for my iPhone app. Not cool. Am I going to have to do this for every update of this app?